Kerry Wong blogged about his Keithley 197 battery option build: I have been quite happy with my fixed-up Keithley 197 5 ½ digit bench meter purchased from eBay (you can find the teardown pictures here) earlier this year. Keithley 197 has a battery pack option (Model 1978), and this option allows it to run on battery […]
Tag Archives: battery pack
Battery pack load
Paul over at Dorkbotpdx writes: I purchased a cheap USB power pack, thinking it would be ideal for powering small projects. But it automatically shuts off if the device isn’t drawing a lot of power, since it’s meant for charging cell phones. Here’s a 2 transistor circuit I built this morning that keeps it on […]